摘要
【目的】探讨外源钙对低温胁迫下棉花幼苗的影响及作用效果。【方法】以冷敏感性基因型棉花品种新陆早12号为材料,采用人工模拟低温处理,分别对棉花幼苗喷施不同浓度CaCl2溶液,5℃低温胁迫3 d后进行叶面伤害指数、叶绿素含量、丙二醛(MDA)含量、可溶性蛋白含量和过氧化氢酶(CAT)活性等测定和分析。【结果】外源钙可以显著降低棉花幼苗低温胁迫后的叶面冷害指数和膜脂过氧化产物丙二醛(MDA)的积累量,提高叶绿素含量、过氧化氢酶活性和渗透调节物质可溶性蛋白质的含量;棉花幼苗叶面冷害指数与叶绿素含量和CAT活性显著相关。【结论】外源钙能够增强棉花幼苗对冷害的抗性。
【Objective】The purpose of this project was studied effects of exoge no us Ca2＋ on chilling resistance of cotton seedlings.【Method】The variety of xi nl uzao 12 was used as the test material,The cotton seedlings were treated by CaCl 2 solut io n with different concentration and that of chilling index,chlorophyll content, MDA content,soluble protein content and CAT activity in artificial low temperat ure treatment 3d were studied.【Result】CaCl2 could obviously decrease chilli ng index and MDA content of cotton seedlings,and increase their chlorophyll conten t,soluble protein content and CAT activity;Significant correlation was showed among CAT activity,chlorophyll content and chilling index.【Conclusion】Exog enous Ca2＋could significantly increase chilling resistance of cotton seedlings.
出处
《新疆农业科学》
CAS
CSCD
北大核心
2012年第4期687-693,共7页
Xinjiang Agricultural Sciences
基金
国家大学生创新性实验计划项目(1075911)
石河子大学高层次人才科研启动资金专项(RCZX200901)
石河子大学SRP资助项目(SRP2010054)
关键词
外源钙
棉花
幼苗
低温胁迫
抗冷性
Ca2＋
cotton
seedlings
low temperature stress
chilling resi stance
